Molding apparatus.



F. W. TICKNER.

MOLDING APPARATUS.

APPLICATION mso APlLza. ma.

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wmwssts To all fwtom it may concer/n,.-

B@V it imma' 'that I, Fnsi; w. neiging a resident of Sharpsville, Mercer county,4V

Pennsylvania, have invented a new and `useful Improvement invMolding Apparatus, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, V forming part of th1s specification, `in which- Figure 1 is a side elevation of a collapsing core barrel constructed in accordance with my inventiongand Y Fig. 2 is a central vertical section takenV on the line II-II of Fig.1,` illustrating Athe core box in dotted lines. Y Y

My invention relates `to collaspible core barrels, particularly those for casting ingot'V molds. It is especially designed to improve upon the devices of Patents 1,018,668, granted to F. X'. Luethner and 1,018,669,

granted to F. X. Leuthner and me on February 27, 1912. Y The object of the invention is to improve the step device forlimitin'g the movement of the core plates, and at the same time prevent the sand molded around the'core `from entering the air spaces in the core during filling of the core box.' Y

In the drawings, in which I showA alformv of collapsible core llike that of Patent 1,018,668, 2 represents the central stemy or.Vv column ofthe core barrel,- which is shown as substantially rectangular in cross section and tapering from the bottom towardY the top in the form of a frustum of a pyramid.

This stem is preferably hollow, though this is not necessary; and when -ho1low, it is preferabl tions andholes to assist in venting.

Inthe form shown, the sides of the core. barrel are formed of four plates 3, which y i. .i of Letters V Pate-nt.

f ward Y of the y provided with a series ofperforanNsYnvAivrA, Assrenon onions-narrare sets 'of -thei bolts, one seit tion iand' the l'other s'etlin the jllfower portion ofthecore. Y

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The plate side portions of thelcore barrel are perforatedfor thus far described1 the patents above referred to. Y

Instead ofthe stops for limiting the up.-

vproper venting;l and as as shown in Patent 1,018,668 or 'Patent 1,018,669,^I provide an improvedstop sys" tem, comprising a lateral projection 9, sur? the device is similar tov movement of kthe core plates, 4such Y rounding the upwardly vprojecting neck 10 column. This 'shoulder' is above'the upper end of the corebox," shown in dotted lines at lliin Fig..2, during'thel molding of I I' the core, and performs two important -funcfY tions: first, 1t serves as a stop deviceA for 'limitingthe vupward movement of thecore kplates. wh1 ch, as, they rise into the dotted VA position s hown at'. stop device, thus giving a simpler and cheaper stop system than in that formerly' used;` and second, it acts to shed'the sand fed into the space. between the collapsible coreV and the core box during formation of vthe core, andkeep this Vsand away vfrom the airspaces between the plates andY central 1 column. In lforming the core, vthe Vsand is Vordinarily shoveled into the space between the core box and the core/barrel before ramming,or otherwise packingthe sand there'-Vv in, and heretofore itl has been impossible to 'keepthis sand out'ofl the'air spaces. ThisV i projecting Yledge -acts to shed this sandjoutwardlv to keep it away from the air sp'aces and direct itinto the proper space between the lcore plates and the core box, thus prewasting sand.

`The advantages of my invention result from this sand-sheddingdevice, which also preferably acts as a-stop for the sideplates when theV extractor shown in Patentv 1,018,669 acts to ejectthe casting., The

12 in Fig. 2, strikethis rlr so 'Y venting iilling up of desirable air' spaces and f .shedding device may be either circular, rec` tangular or of* any other desirable shape.' The form of the core boX, plates, etc.,vmay be varied without departing from my inven-J txOIlej rIcl'a'in'l:A I f 1.A A collapsible core barrel having a central rcolumn with a plate "system movable thereon, and a shedding device on the upwardly projecting stem of the coluinn arrangedV to protect the air spaces of the core from entering sand, substantially as described. i y

2. A collapsible core barrel having a central column With a plate system movable thereon, and a shedding device on tlie'upwardly projecting stein of the colurnn arranged to protect the air spaces of the core :from entering sand, said shedding device also coacting With the plate side structure Copies of this patent maybe obtained fv-or 15 tral stein vor column, and movable plate n sides, theupwardly projecting stern of the column having'a shedding flange arranged to` be above the level of the core boX and shed the entering sand away from the air spaces, substantially as described. Y f' ln testimony whereof I have hereunto set iny hand.

FRANK W. TICKNER.

ve cents each, by addressing the Commissioner of Patents.

Washington, C. 

